fix(alicode-intl): split into Coding Plan + Model Studio providers

8b9cac1 swapped alicode-intl to the DashScope compatible-mode endpoint to
fix #2591 for standard DashScope keys, but that broke Coding Plan keys
(sk-sp-...) which only work on coding-intl.dashscope.aliyuncs.com. The two
key types use two different hosts and are not interchangeable.

- alicode-intl: revert to coding-intl endpoint (Coding Plan keys)
- alims-intl: new provider for dashscope-intl/compatible-mode (standard keys)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/__baseline__/alias-baseline.json

@@ -98,6 +98,7 @@
   "idToAlias": {
     "alicode": "alicode",
     "alicode-intl": "alicode-intl",
+    "alims-intl": "alims-intl",
     "anthropic": "anthropic",
     "antigravity": "ag",
     "assemblyai": "assemblyai",
@@ -168,6 +169,7 @@
     "ag",
     "alicode",
     "alicode-intl",
+    "alims-intl",
     "anthropic",
     "assemblyai",
     "black-forest-labs",